Ultrasound unit



FIG. 1 is a perspective view of the ultrasound unit;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view there of;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines shown are included for the purpose of illustrating portions of the ultrasound unit that form no part of the claimed design. 

The ornamental design for a ultrasound unit, as shown and described. 